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-rw-r--r--dom/html/HTMLSharedElement.cpp227
1 files changed, 227 insertions, 0 deletions
diff --git a/dom/html/HTMLSharedElement.cpp b/dom/html/HTMLSharedElement.cpp
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+++ b/dom/html/HTMLSharedElement.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/HTMLSharedElement.h"
+#include "mozilla/dom/BindContext.h"
+#include "mozilla/dom/HTMLBaseElementBinding.h"
+#include "mozilla/dom/HTMLDirectoryElementBinding.h"
+#include "mozilla/dom/HTMLHeadElementBinding.h"
+#include "mozilla/dom/HTMLHtmlElementBinding.h"
+#include "mozilla/dom/HTMLParamElementBinding.h"
+#include "mozilla/dom/HTMLQuoteElementBinding.h"
+
+#include "mozilla/AsyncEventDispatcher.h"
+#include "mozilla/MappedDeclarations.h"
+#include "nsAttrValueInlines.h"
+#include "nsStyleConsts.h"
+#include "nsMappedAttributes.h"
+#include "nsContentUtils.h"
+#include "nsIContentSecurityPolicy.h"
+#include "nsIURI.h"
+
+NS_IMPL_NS_NEW_HTML_ELEMENT(Shared)
+
+namespace mozilla::dom {
+
+HTMLSharedElement::~HTMLSharedElement() = default;
+
+NS_IMPL_ELEMENT_CLONE(HTMLSharedElement)
+
+void HTMLSharedElement::GetHref(nsAString& aValue) {
+ MOZ_ASSERT(mNodeInfo->Equals(nsGkAtoms::base),
+ "This should only get called for <base> elements");
+ nsAutoString href;
+ GetAttr(kNameSpaceID_None, nsGkAtoms::href, href);
+
+ nsCOMPtr<nsIURI> uri;
+ Document* doc = OwnerDoc();
+ nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(uri), href, doc,
+ doc->GetFallbackBaseURI());
+
+ if (!uri) {
+ aValue = href;
+ return;
+ }
+
+ nsAutoCString spec;
+ uri->GetSpec(spec);
+ CopyUTF8toUTF16(spec, aValue);
+}
+
+void HTMLSharedElement::DoneAddingChildren(bool aHaveNotified) {
+ if (mNodeInfo->Equals(nsGkAtoms::head)) {
+ nsCOMPtr<Document> doc = GetUncomposedDoc();
+ if (doc) {
+ doc->OnL10nResourceContainerParsed();
+ }
+
+ RefPtr<AsyncEventDispatcher> asyncDispatcher =
+ new AsyncEventDispatcher(this, u"DOMHeadElementParsed"_ns,
+ CanBubble::eYes, ChromeOnlyDispatch::eYes);
+ // Always run async in order to avoid running script when the content
+ // sink isn't expecting it.
+ asyncDispatcher->PostDOMEvent();
+ }
+}
+
+static void SetBaseURIUsingFirstBaseWithHref(Document* aDocument,
+ nsIContent* aMustMatch) {
+ MOZ_ASSERT(aDocument, "Need a document!");
+
+ for (nsIContent* child = aDocument->GetFirstChild(); child;
+ child = child->GetNextNode()) {
+ if (child->IsHTMLElement(nsGkAtoms::base) &&
+ child->AsElement()->HasAttr(kNameSpaceID_None, nsGkAtoms::href)) {
+ if (aMustMatch && child != aMustMatch) {
+ return;
+ }
+
+ // Resolve the <base> element's href relative to our document's
+ // fallback base URI.
+ nsAutoString href;
+ child->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::href, href);
+
+ nsCOMPtr<nsIURI> newBaseURI;
+ nsContentUtils::NewURIWithDocumentCharset(
+ getter_AddRefs(newBaseURI), href, aDocument,
+ aDocument->GetFallbackBaseURI());
+
+ // Check if CSP allows this base-uri
+ nsresult rv = NS_OK;
+ nsCOMPtr<nsIContentSecurityPolicy> csp = aDocument->GetCsp();
+ if (csp && newBaseURI) {
+ // base-uri is only enforced if explicitly defined in the
+ // policy - do *not* consult default-src, see:
+ // http://www.w3.org/TR/CSP2/#directive-default-src
+ bool cspPermitsBaseURI = true;
+ rv = csp->Permits(
+ child->AsElement(), nullptr /* nsICSPEventListener */, newBaseURI,
+ nsIContentSecurityPolicy::BASE_URI_DIRECTIVE, true /* aSpecific */,
+ true /* aSendViolationReports */, &cspPermitsBaseURI);
+ if (NS_FAILED(rv) || !cspPermitsBaseURI) {
+ newBaseURI = nullptr;
+ }
+ }
+ aDocument->SetBaseURI(newBaseURI);
+ aDocument->SetChromeXHRDocBaseURI(nullptr);
+ return;
+ }
+ }
+
+ aDocument->SetBaseURI(nullptr);
+}
+
+static void SetBaseTargetUsingFirstBaseWithTarget(Document* aDocument,
+ nsIContent* aMustMatch) {
+ MOZ_ASSERT(aDocument, "Need a document!");
+
+ for (nsIContent* child = aDocument->GetFirstChild(); child;
+ child = child->GetNextNode()) {
+ if (child->IsHTMLElement(nsGkAtoms::base) &&
+ child->AsElement()->HasAttr(kNameSpaceID_None, nsGkAtoms::target)) {
+ if (aMustMatch && child != aMustMatch) {
+ return;
+ }
+
+ nsString target;
+ child->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::target, target);
+ aDocument->SetBaseTarget(target);
+ return;
+ }
+ }
+
+ aDocument->SetBaseTarget(u""_ns);
+}
+
+void HTMLSharedElement::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
+ const nsAttrValue* aValue,
+ const nsAttrValue* aOldValue,
+ nsIPrincipal* aSubjectPrincipal,
+ bool aNotify) {
+ if (aNamespaceID == kNameSpaceID_None) {
+ if (aName == nsGkAtoms::href) {
+ // If the href attribute of a <base> tag is changing, we may need to
+ // update the document's base URI, which will cause all the links on the
+ // page to be re-resolved given the new base.
+ // If the href is being unset (aValue is null), we will need to find a new
+ // <base>.
+ if (mNodeInfo->Equals(nsGkAtoms::base) && IsInUncomposedDoc()) {
+ SetBaseURIUsingFirstBaseWithHref(GetUncomposedDoc(),
+ aValue ? this : nullptr);
+ }
+ } else if (aName == nsGkAtoms::target) {
+ // The target attribute is in pretty much the same situation as the href
+ // attribute, above.
+ if (mNodeInfo->Equals(nsGkAtoms::base) && IsInUncomposedDoc()) {
+ SetBaseTargetUsingFirstBaseWithTarget(GetUncomposedDoc(),
+ aValue ? this : nullptr);
+ }
+ }
+ }
+
+ return nsGenericHTMLElement::AfterSetAttr(
+ aNamespaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify);
+}
+
+nsresult HTMLSharedElement::BindToTree(BindContext& aContext,
+ nsINode& aParent) {
+ nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ // The document stores a pointer to its base URI and base target, which we may
+ // need to update here.
+ if (mNodeInfo->Equals(nsGkAtoms::base) && IsInUncomposedDoc()) {
+ if (HasAttr(kNameSpaceID_None, nsGkAtoms::href)) {
+ SetBaseURIUsingFirstBaseWithHref(&aContext.OwnerDoc(), this);
+ }
+ if (HasAttr(kNameSpaceID_None, nsGkAtoms::target)) {
+ SetBaseTargetUsingFirstBaseWithTarget(&aContext.OwnerDoc(), this);
+ }
+ }
+
+ return NS_OK;
+}
+
+void HTMLSharedElement::UnbindFromTree(bool aNullParent) {
+ Document* doc = GetUncomposedDoc();
+
+ nsGenericHTMLElement::UnbindFromTree(aNullParent);
+
+ // If we're removing a <base> from a document, we may need to update the
+ // document's base URI and base target
+ if (doc && mNodeInfo->Equals(nsGkAtoms::base)) {
+ if (HasAttr(kNameSpaceID_None, nsGkAtoms::href)) {
+ SetBaseURIUsingFirstBaseWithHref(doc, nullptr);
+ }
+ if (HasAttr(kNameSpaceID_None, nsGkAtoms::target)) {
+ SetBaseTargetUsingFirstBaseWithTarget(doc, nullptr);
+ }
+ }
+}
+
+JSObject* HTMLSharedElement::WrapNode(JSContext* aCx,
+ JS::Handle<JSObject*> aGivenProto) {
+ if (mNodeInfo->Equals(nsGkAtoms::param)) {
+ return HTMLParamElement_Binding::Wrap(aCx, this, aGivenProto);
+ }
+ if (mNodeInfo->Equals(nsGkAtoms::base)) {
+ return HTMLBaseElement_Binding::Wrap(aCx, this, aGivenProto);
+ }
+ if (mNodeInfo->Equals(nsGkAtoms::dir)) {
+ return HTMLDirectoryElement_Binding::Wrap(aCx, this, aGivenProto);
+ }
+ if (mNodeInfo->Equals(nsGkAtoms::q) ||
+ mNodeInfo->Equals(nsGkAtoms::blockquote)) {
+ return HTMLQuoteElement_Binding::Wrap(aCx, this, aGivenProto);
+ }
+ if (mNodeInfo->Equals(nsGkAtoms::head)) {
+ return HTMLHeadElement_Binding::Wrap(aCx, this, aGivenProto);
+ }
+ MOZ_ASSERT(mNodeInfo->Equals(nsGkAtoms::html));
+ return HTMLHtmlElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+} // namespace mozilla::dom
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